package DiErZhou.Day2;

public class Day1_1 {
    public static void main(String[] args) {
        for (int i = 0; i <4; i++) {
            for (int i1 = 0; i1 < 2*i+1;i1++ ) {
                System.out.print("*");
            }
            System.out.println();
        }
    }
}
